Road scraper



n:. E." BURNS.4 v "Row SCRARR.'

APPLICATION m50 APR, v3.13224 Patenteas'eptllwzz I L4- f muem/or @MM 4Toall 'whom may cof/weite Patented sept. is, 1922.

DAVID E. BURNS, F GRAND RAPIDS, MICHIGAN, ASSIGNOR 0F N 1li-'HALF ToHamm J. MCKDLEY, GF GRAND RAPIDS, MICHIGAN.

ROAD sesame.

' applicaties 'fuedfsprn 3,

Be it known that I, Devin E. Bienne, a

` citizen of the United S-tetes of-A.n1erica, re-

' pertains-to make and use'the'snme.

siding at :Grand Rapids' in the county of Kent and State 'ofMichigan,.have invented certain new/"and useful improvements 1X1 RoadScrapers; and I do hereby declare the vfollowing.to here. 4full,cleanand exact de scriptionof theinvention, such es will en able othersskilled' in 'the art to 'which it ap- This invention'j'relates toimprovements in road. Scrapers snfl'more particularly to such Scrapersadapted .to be attached to the rsrneof, a motor vehicle, preferably a,motor truck, and its object is to provide asc/repel' which may bequickly attached and readily A:icljustedto any ordinary type of motortruck7 which may be quickly removed when not'A in use, and which will.effectively and smoothly scrape the surface of the road over which thevehicle passes.'

The scraper blade is yieldably held against the road surface when inoperative position and the device is provided with. means by which thepressure of the blade upon the road surface maybe graduated and thismeans is Aalso adaptedto raise the blade entirely from. the lrondsurface when so Clesired. Means for raising and lowering the scraper'cladea-nd also for adjusting the blade either parallel or angularlyrelative to the road surface is also provided, and the device hasvarious other new and useful feeturcs of construction and arrangementwhich are hereinafter i'nore fully described and particularly pointedout inthe claims, reierence being had 'to the accompanying drawings, inwhich:

' Fig. lis a side elevation of a motor truck showing thefroad scraperembodying this invention attached thereto in operative position. v

Fig. 2 is a plan view, diagrammatic in nsmounted,

1922. Serial No.. 549,680..

frame of th'e' vehicle showing the: connecting A device used for thispurpose.

Fig. 5 is aront elevation` ofthe scraper also showing portionsioftheframe of the vehicle. f

Fig- 6 is an enlarged perspective .view of one of the shaft. supporting'arms amd the adjustablebearingsmounted thereon.

= F1g. 7 is m elevation of a portion of the scraper blade and theshafton whiohvit is spring.

Fig.l'8 illnstretes s modified A sure spring.

Fig. 9 is a transverse sectional elevation on the line 9-9 of Fig. 5. i

rxn'of presu Showing eens of the pressure Fig. 'l0 isv en enlargedtransverse section through 'the roclg shaft. and Sleeve showingthejoressure spring attached there. Figli is en elevation, partlyvinfsection' .and with. parts broken away,` shmvingv the tend beneaththe lower surface of the frame -members ily-these frame memberspreferably being ofchannel construction., and clamps 6 are providedwhich embrace both the brackets 5 and a portion of the frame 1, andVbind.

them together by friction attained through the screws 7.

A plurality of parms 8 are attached to the l under sur-face of. thehanger board 4 and extend downward therefrom. and each erm hasAifnormted thereon. a vertically 'movable bearing block '9, each ofwhich is provided with aclampin screw l() threaded 'in theblock andengaging the arm 8. A rock shaft 11, preferably of tubularconstruction', extends lcngitudinally beneath han er board beingjournalled in the vbearing blo ks 9. A plurality of sleeves l2 are'located upon l the rock shaft 11, each of said sleeves being properlattached to the rock shaft 11,

provided' with clamping screws 13 threaded in the sleeves and engagingthe rock shaft, and a pressure spring 1a is coiled about each sleeve,one end of the s aring being attached to the sleeve, preferab y by beingbent inward as at 15, and inserted into a hole in the" sleeve, and theother end of the'spring extends downward and rearward and is attached tothe scraper blade 16 by any suitable fastening means such as' U bolts 17similar to those illustrated.

The scraper blade attached to the rock shaft as above described ispressed against the road surface by means of the springs 14 whenthe rockshaft 11 is rotated in a direction to tighten the springs. The followingdescribed means is employed' to rotate the rock shaft 11. A worm gearsegment 18 is and a worm 19 located adjacent the upper periphery of theworm gear meshes therewith being {ixed to a. shaft 2() which isjournalled in bearings 21 fixed to an arm 22, the said arm having a hub23 which surrounds therock shaft 11 and a collar 24 fixed to the rocksha-ft retains the hub 23 ,in its position adjacent the hub of the wormgear 18 and thus insures the location of the arm 2Q to retain the worm19 in mesh with the worm gear. The forks 25 extend upward from the arm22 embracing the hanger board 4 and retain the arm 22 in uprightposition.y rThe forks will not permit rotation'of the arm Q2, but theywill admit the vertical movement of the rock shaft relative to the`hanger board.

A bracket Q6 is attached to the frame 1 of the vehicle near the driver-sseat and a vertical shaft 27` rotatably mounted in this bracket carriesa hand -wheel 28 at its upper end, and a bevel gear 29 at its lower end.Atn-extensible shaft comprising the members 3() and 31 and having theuniversal joints 32 and 33 at its `respective ends extends between theshaft 20 on which the worm is mounted and bracket 26'in which theuniversal joint 33 is journalled, and a bevel gear 84. meshing with thebevel gear 29 transmits the movement of the shaft to the worm 19. Themember 3() of the extensible shaft telescopes within the member 31', themember 31 being provided with a plurality of holes through one of whichthe cotter pin 35 is inserted, the pin also passing through a hole inthe member 30 to connect the two members.

The scraper as a unit assembly may be easily fastened to any ordinarymotor truck by placing it beneath the frame of the truck and applyingthe clamps 6. to attach the bracket 5 to the frame and then attachingthe bracket 26 in a position convenient to the drivers4 seat. By virtueof the universal joints 212 and 33 and the ,extensible feature of theshaft connecting them. the location 12@L which is of the bracket 26relative to the scraper assembly may be varied within reasonable limitsand yet be made to. fit and function properly. The device is installedso that the scraper blade assumes an anglecrelative to the longitudinalanis of the -Mvehicle and after it has been properly installed thescraper blade 16 is brought into contact with the road surface byrotation of the hand wheel 28 and through its members rotates the rockshaft 11 and increases the tension of the pressure spring 14 whereby thepressure of the blade against 'the road surface may be varied at willand when adjusted it will remain in this position because ofthchirreversible quality of the worm and worm gear connection. vThetension of each individual spring 14 may be regulated by rotating thesleeve 12 to whicu it is connected upon the rock shaft 11 and thenclamping the sleeve yto the shaft by theset screws '13. lf it is desiredto operate the'truclr for a short time without using the scraper lblade, the rock shaft may be rotated by means of the hand wheel to raisethe scraper blade as Iillustrated by dotted lines in Fig. 9. 1t is alsoeasy to remove the scraper assembly by detaching the clamps 6 anddisconnecting shaft members'() and 31 and thereby re lieving the vehicleof the Weight and encumbrance of thev device when it is no-t in use.

1t is often desirable to have the scraper blade elevated more at one endthan at the other, and to obtain this adjustment the vertically nfovablebearing blocks 9 may beadjusted to the desired position'upon the arms 8and this adjustable feature also en-lI ables the blade to be adjusted tothe proper height to fit vehicles of different dimensions. When the rockshaft 11 is vertically adjusted by moving the bearing blocks 9 on thearms 8, the Worm 19 and Worm gear segment 18 always remain in properrelation and the forks 25 slidc'upor down upon the hanger board 4. A V

.The modified pressure spring construction illustrated in Fig. 8contemplates the necessity of increasing the spring pressure andutilizesa double spring 14a in place of the single spring before described, thisspring 14. having a loop 14h at its middle iortion whichv is attachedtothe scraper lade 16 and its respective ends each extend upward and arecoiled about a sleeve fixed to the rock shaft 11 similar to the sleeves12. The pressure springs are preferably coiled about the sleeves in themanner shown, that is one end before attached to the scraper blade, thespring thence extends diagonally upward and forward and thence i-scoiled from front to rear over and about the sleeve.

l claim:

1. A road scraper, comprising a scraper the extensible blade, a shaftabove the scraper blade, a'

plurality of springs, each coiled about said shaft andfhavingone endadjustably fastened to the sha-ft' and the other end fastened to thescraper blade, means for rotatably mounting the shaft on va `vehicle andmanually operable means for turning the shaft.

2. A road scraper comprising a scraper blade, a rock shaft, a pluralityof springs, each coiled about said rock shaft and having one eiidadjustably attached to the rock' shaft Vand the other end' attached to-Vthe scraper blade, means for mounting the rock shaft on a'yehicle'andmeans for rotating the rock shaft. 4 l

- 3. A road scraper comprising a scraper blade, a shaft, a plurality ofsleeves rotatably adjustable upon'said shaft, .a spring coiled abouteach sleeve and having one end attached to the sleeve and the other endattached tothe scraperblade means for ro- I tatably mounting the shafton a vehicle and means for manually turning 4the Ishaft to raise orlower the scraper blade.

4. A road scraper comprising a scraper blade, a rock shaft, a pluralityofv sleeves rotatably adjustable' upon said rock shatt,

a .spring coiled about each sleeve having i one end attached to thesleeve and the other endv attached to the scraper blade, means formounting the rock shaft on a vehicle, and

means for rotating the rbck shaft.-

5. A road scraper comprising a scraper blade, a shaft above the scraperblade, means for mounting the shaft on a vehicle,` and a plurality ofsprings each having oney end attached to the 'scraper blade and thenceextendingV upwardly and in front ot the shaft and coiled, about theshaft and having its other end fastened to the shaft.

6. A road, scraper comprising a scraper blade, a shaft abovethe scraperblade, means vfor mounting the shaft on a vehicle, a plu- `rality ofsleeves rotatably adjustable upon the shaft, a plurality of springs eachhav' ing one end attached to the scraper blade and thence'extendingupward and in front of a respective sleeve and thence coiled about t-liesleeve -and attached thereto.

7. Inv a road scraper, a motor'vehicle having a chassis frame includingparallel side 'members of channel formation. brackets located one ,undereach side member having 4ends located under and against the under saidworm gear segment and journalled in bracket connected to the 'hangerboardpalnd.

means tor rotating saidvvorin Jfor thepiirpose described.

'4 *l .I t). A road scraper comprisingr a hanger board, means forYattaching the hanger board to the frame of avehicle, a rock shaftmounted on thehanger board, a scraper blade mounted o'ii the rock shaft,a worm gear segment fixedto the .vock'shait` a worm meshing with saidsegment and ljournalled in a bracktfconnected to the hanger boa-rd,alongitudiiiallv extensible shaft connected by a universal joint to saidworm, a bracket fixed to the frameof vthe motor vehicle, a manuallyrotatable shaft journalled in said bracket, a bevel gear on said shaft,and a second bevel gear meshing with the first beveled gear andconnected by a universal joint to saidextensible shaft substantially :isand y for the purpose described.

li). A road scraper comprising allianger board, a vmeans for attachingthc hanger board to the frame of the vehicle, a plurality of armsdepending fromsaid hanger board, a vertically adjustable bearing blockon each arm,.a rock shaft journalled in said bearing block, a scraperblade mounted on said rock shaft, a worm gear segment fixed to said rockshaft, a biturcated arm embracing Vthe hanger board and rotatablyconnected tothe rock shaft, a. worm journalled in said ico' arm andmeshing with the `worm gear segment, and means for rotating the Worm forthe purpose described.

11. A road scraper comprising a hanger rock shaft, a. Worm gear Segmentfixed'to f said roclcshaf't,l a bifurcated arm embracing the hangerboard and rotatably connected to the rock shaft, a worm journalled insaid arm and meshing with the worm lgear segment, a longitudinallyextensible shaft' connected bya universal .joint to said worm, a bracketattached to the frame ot the veict hicle, a manually-'rotatable shaft`journalled in said bracket, a bevel gear on said shaft, a second bevelgear meshing with the first bevel gear and connected by a universaljoint to the extensible shaft.

A road scraper comprising a hanger vboard` means for attaching thehanger board to the frame of a vehicle. a plurality of arms dependingfrom said hanger board, a. vertically adjustable bearing block on eacharm, a rock shaft journalled in said bearing blocks, a scraper bladebeneath the rock Shaft, a plurality of sleeves rotatahly atljustable onsaid rock shaft. a spring coiled about each sleeve and haring one endattached to the Sleeve and the other exnl attached to thaseraper blade.

lf-LlA road scraper eoinprisin; r a hanger board, means for tletaehahlyconneeting the hanger board to the traine of a vehicle. a plurality oarms lepen lin r from said hanger board, a vertically adjustahle hearingblock on earl] arm, a rock shaft journalled in Said hearingV hloeli@ ascraper hlznle heneuth the rock shaft, a pluralit)Y of rotatahlyatljustahle. sleeves on said rock shaft. a spring.r coiled ahout eachsleeve and having-one end attached to the sleeve and the otherenllattachetl to the scraper hlatle` a vworm gear segment fixed to the rockshaft, a hifureatetl arxn elnln'aeing'the hanger hoard and rotatablyeonneetetl to theI rook shaft, u worin journalled in the arln `antlmeshing with the, worin Igear Segment. a longitudinall)v extensihleshaft eonneetetl 'oy a universal `iointy to the worin. a hraeltet'fastened to the traine of the vehiele. a manually .votatahle shaftjournalletl in the hlarket. a hevel rear on the shaft, aseeolnlhevelagfear meshing! with the first herel gear and :eo'nneetetl hy auniversal joint to the saill extensible `Shaft,

ln testimonyv whereof 1 attix my signature.

DAVID Ef I l RNS.

